Ganzo Formation

[ Top ] [ Japanese ]

Ganzo Formation (Ichimura, 1935) Takeuchi et al., 2017

Type locality: Sasagawa river, Ganzo, Asahi city, Shimoniikawa county, Toyama prefecture
Volcanic rocks
early Miocene

Lithofacies: Andesite volcanic breccia, Tuff breccia
Lithofacies (Minor): Lapilli tuff, Tuffaceous sandstone

Thickness: 180 - 300 m or thicker

Asahi city, Toyama pref.
[ Upper ]
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Sazen Formation
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Hanyu Formation / Sasagawa Formation
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Ganzo Formation
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[ Lower ]

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

Distribution: Sasagawa river - Otanigawa river - Shicchadani river - Hanyu - Hirudan, Asahi city, Shimoniikawa county, Toyama pref.

Takeuchi et al. (2017) Geology of the Tomari District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 121p. (in Japanese with English abstract 4p.)